The use of modern power electronics and microprocessor-based equipment makes it possible to upgrade the traction drive power schemes of the operating locomotive stock and provide them with high dynamic characteristics, efficiency, power factor, and electromagnetic compatibility. Modern digital systems that are insensitive to
Permanent magnet synchronous motors (PMSMs) have been employed in the direct drive traction system of locomotives as the traction motor. Due to the unique traction structure of the direct drive system, complicated excitations such as track irregularity and harmonic torque have a direct effect on the dynamic performance of the
Dynamic equations of the locomotive traction and the torsional vibration of a locomotive drive system are established. MATLAB/SIMULINK is used to build the simulation model. The simulation results indicate that the self-excited torsional vibration will occur when the initial slip velocity is located at the descending slope of the adhesion coefficient curve.
The block schematic of proposed locomotive drive system is shown in Fig. 1a in which the voltage source inverter (VSI) of the conventional locomotive is replaced by high-performance bi-directional ZSI. The locomotive consists of single phase step down transformer, AC–DC front end converters, inverters and traction motors.
Development of railway transportation capabilities towards high-power, high-speed and heavy axle-load makes the dynamic interactions between the electric drive subsystem and the mechanical subsystem of a locomotive more intensive and complicated, which may threaten the locomotive operational safety. However, the included dynamics
The torsional vibration. of a driving system causes excessive stress in the system, providing a train to achieve its best adhesion performance, and also, it negatively impacts the dynamic
To investigate the re-adhesion and dynamic characteristics of the locomotive drive system with wheel slip controller, a co-simulation model of the train
Fig. 3: locomotive with diesel-hydraulic drive system 1 Diesel engine 2 ECU (engine control unit) 3 POM 4 PAU Engine 5 Electronics control cabinet 6 Cooling plant (cooler fans) 7 Fluid transmission Fig. 1: system overview of diesel-hydraulic and diesel-electric Ac locomotives 1 PAU Engine 2 Cooler fans 3 Fuel management 4 Air filter monitor
Steam locomotive components. Appearance. Main components found on a typical steam locomotive include: The main components of a typical steam locomotive. Click or hover over numbers to see names. ( enlarge) The diagram, which is not to scale, is a composite of various designs in the late steam era. Some components shown are not the same as, or
Obviously, the main purpose of the driving wheels of a steam locomotive is to support the weight of the locomotive and transfer linear force from the pistons into rotational force
Geared steam locomotive. A geared steam locomotive is a type of steam locomotive which uses gearing, usually reduction gearing, in the drivetrain, as opposed to the common directly driven design. This gearing is part of the machinery within the locomotive and should not be confused with the pinion that propels a rack locomotive along the rack
The drive system used in these models will be manufactured by our parent company, ECS Fabrication, Inc. It is the latest and final variant of the ECS drive system and offers powerful and totally silent running capability. All moving parts on this drive are made of metal – no plastic. All parts are made and assembled in the USA at the ECS
In a diesel–electric locomotive, the diesel engine drives either an electrical DC generator (generally, less than 3,000 hp (2,200 kW) net for traction), or an electrical AC alternator
A diesel locomotive is a type of railway locomotive in which the power source is a diesel engine. Several types of diesel locomotives have been developed, differing mainly in the means by which mechanical power is
Abnormal vibration can lead to frequent maintenance requirements of electric locomotives. Many factors contribute to the vibration, and the influence mechanism of pulsating torque generated by interharmonics in the traction drive system (TDS) is not clear at present. In this article, an electromechanical coupling model is developed to investigate the
The driving wheels (boxed) on Pennsylvania Railroad 1737 Traction motor for a German locomotive. On a steam locomotive, a driving wheel is a powered wheel which is driven
To investigate the re-adhesion and dynamic characteristics of the locomotive drive system with wheel slip controller, a co-simulation model of the train system was established by SIMPACK and MATLAB/SIMULINK. The uniform running and starting conditions were considered, and the influence of structural stiffness of the drive
This Metra EMD F40PHM-2 locomotive uses a diesel–electric transmission designed by Electro-Motive Diesel. A diesel–electric transmission, or diesel–electric powertrain, is a transmission system for vehicles powered by diesel engines in road, rail, and marine transport.Diesel–electric transmission is based on petrol–electric transmission, a
In diesel and electric locomotives, the power generated by the engines or electric motors is transmitted to the wheels through a complex system of gears, shafts, and axles. The power is typically transferred to the wheels via a transmission system, which may include gearboxes, driveshafts, and differentials.
This control system functionality does not correspond to the current technological level. This paper considers the use of digital control systems for electric rolling stock and their advantages. {Modern Locomotive Traction Drive Control Systems}, author={A. T. Burkov and O. S. Valinsky and Andrey Evstaf''ev and Aleksandr Maznev
A diesel locomotive is powered by a diesel engine. The diesel engine may drive the locomotive''s wheels directly via a gearbox, shaft or chain (called mechanical transmission) or by using a hydraulic transmission system (diesel-hydraulic). Most of the locomotives in the world are diesel-electric, due to their ease of use and reliability.
UIC classification system was typically used for electric locomotives, as it could handle the complex arrangements of powered and unpowered axles and could distinguish between coupled and uncoupled drive systems.
This study investigates the dynamic response of a locomotive drive system experiencing wheel/rail saturation adhesion. A dynamic locomotive model is created and then integrated with electromechanical and control systems to simulate the vibration in the component parts of the drive system. The model is used to investigate
Abstract. Development of railway transportation capabilities towards high-power, high-speed and heavy axle-load makes the dynamic interactions between the electric drive subsystem and the mechanical subsystem of a locomotive more intensive and complicated, which may threaten the locomotive operational safety.
video shows working principle of a Walschaerts valve gear. The gear system is superimposed on a modified ve
Based on the co-simulation method and vehicle-track coupling dynamics, a model which enables considering dynamic interactions between the electric drive subsystem and the mechanical subsystem of a locomotive through an electromagnetic coupling interface and motor control subsystem is developed in this paper.
A diesel locomotive is a type of railway locomotive in which the power source is a diesel engine. Several types of diesel locomotives have been developed, differing mainly in the means by which mechanical power is conveyed to the driving wheels. The most common are diesel-electric locomotives and diesel-hydraulic.
Modern traction electric drives of locomotives are complex electromechanical systems, the creation and development of which requires improving the methodology of their research [].One of the most promising options for automated traction drives can be called a frequency-controlled electric drive, which includes a bunch of
There were four types of disc driving wheels for steam locomotves. Each was made by a different company and each varied slightly from the others in their appearance. The four types were: Boxpok Disc Drivers. Manufactured by General Steel Castings of Granite City, IL. Patent numbers US1960039 and US2042160.
The torsional vibration model of a locomotive drive system with two degrees of freedom was established by Liu [16], the study showed that the torsional vibration happened when the creep speed is
Based on the co-simulation method and vehicle-track coupling dynamics, a model which enables considering dynamic interactions between the electric drive